Improvement in powee-attachment to sewing-machines



@niet im, @WM @mm Letters Patent No. 75,666, dated .March 17, 1868.

IMPROVEMENT 4ni Powsssurrsouusnr To sswmesurcnmns. 4'

fritte tlphule nfrtnitt in tigen tsttets t,testent nu .mating @mit nftherme.

TO ALL WHOM IT MAY OONCERN:

y VHei-it known that I, ARCHIBALD C. URARY, of Uticn,v0neida county, Nework,'hnve invented e ncrv' and useful Improvement lin the Mode ofOperating Sewing-Machines, y' I The nature of myfinvention consists inattaching tolsewingrnachines a spring or springs for drivingthe same,which spring or springs may be`.woun dup by the weight ofitheoperatorpressing upon the 'sent g, and I do hereby declare that the followingi-s'n full, clear, and exact `description ofthe construction andoperation of the same, reference being had to the accompanying drawings,making a. part of this specication3 in whichf- Figure 1 represents anend view ci" the seat and machinery.

Figure 2; a side view.

- Figure 3, a. view of the 4spring and barrel; and

Figure 4, a. view of the endless screw. f y i The seatioi`- theoperator, to which the works are attached, is composed of a bese', A,and the seat propel', A1, and a platform, A2, about half way betweenthem. The seat is raised hyl four spiral springs A3 A3 A:s A3, in whichsprings are rods Af, extendinginto the tubes'jA5, which tubes rundown tothe base, A. When the seat A is pressed down it'restson the tubes, 'Onthe under side of the seatAl aretwo racks, B B, which extend downwardsthrough th'eplatforiu Aiywhich racks turn two'anged pinions Bl B,attneh'ed to the shaft B2. v On the back sideof the racks, and opposite4,the piuions BYB, are two friction-rollers B3, also anged to keep theracks steady and up to the pinions. The shaft Bz extends out. beyond theside of theseat, und is supported hy the frame of the machinery. On theehd of the shaft is the loose wheel C. On each side of C is a. ratchet,C1 and.

C2, and pawlsC3 and The ratchet rand pawl C2 and C* serve to turn thewheel to the right, when the racks are pressed down, land the ratchetand pawl CI and C3 hold the' wheel C while the racks are raised. Gearinginto the upper ,side ofthe wheel C is a. pinion, D, on the shaft Dl, andon the other end of D1 is the barrel D2, containing the coiled springD3,forgiving motion to the sewing-machine. Thebarr'el is loose and revolvesfreely on the shaft,'the spring only being attached to the sha-ft and tothe barrel in the usual manner in such cases.

The edge of thebarrel D2 is toothed, :1nd geared initoit is a pinion, E,on the shaft El, at the side of which pinion is the wheel EZ, on saidshaft.- Suid wheel `E2 drives a. pinion, F, on the shaft Fl; on whichshaft is a wheel, F2; or, instead of a simple wheel, as described, itmay combine e. wheel and barrel, containing a. spring similar to D3, inwhich case the barrel and wheel should-he loose on theshztft, as inthe'case of D3. The wheel F2 drives a pinion, G, on the shaft G1, 'onwhich shaft is the wheel G2, and said wheel Gr2 drives a pinion, H, onthe shaft H1, on which shaft H1 is a .wheeh'Hh On the outer end of-IIFisa fan or ily, H3. On the inner end of Hi they he a crank,-'H,.asseen'in figs. -and 2, or other proper means of connecting themachinery'with the sewing-machine. The racks should hev of such lengththat when pressed down to the tubes they will turn the pinions B1 Blonce around, and-consequently cause the wheel C, by means of the ratchetand pawl C2 and 0*, to revolve once around, while the pinion D should beof such size as to cause the shaft Dl to revolve six times around. Whenthe racks rise, they of course cause the-shaft B1 to revolve backwards,but the wheel C is prevented from `turning with it by means of theratchet a-nd pawl Cl and C". To prevent the wheel C operating too often,in consequence of the movements of the operator, when once pressed down,the seat may be held down by means of .steps A". Oi' course the numberof times the spring may be turned at each pressure upon the seat,

may be varied by changing the proportions of the rocks, pinions, orwheels.v

The operation is apparent from the description already given. On sittingdown on thc seat, the weight of the operator presses down the racks B B,which cause the pinions B1 B1 Yto revolve, and they the shaft B2, which.in turn causes the loose wheel C to turn .once around, bymenns of theratchet and pawl C2 and C4, which wheel C, in turning, causes the pinionD and shaft D1 to turn around six times, and thus wind up the coiled.spring inthe barrel on said shaft. This spring being-wound up, sets thepinion E in motion, and consequently the remainder of the machinery uptothe crank H4' on the last shaft, which being connected withthesewingmnchine by a Connecting-rod or other proper connection, sets thesewing-machine in motion. The second spring will serve to accommodatethe machinery to any shocks but it is not necessary to the perfectionofthe machine. The fan or Hy H3 gives steadiness to the motion ofthemachine. When the operator has pressed the seat down, it may hefastened there with thecatchAs, until it is necessary to wind up thesprings-again, when the seat maybe allowed to rise and then againbepressed down, as described,

In addition to this mode of winding up the springs, or in place of it,the ends of each spring-shaft may bc tted for a key, and be wound uplike a watch o1' clock. And in place of either mode, or in addition toit. there may be a, shaft with an endless screw thereon, so arranged asto move on the leaves of ,.-i pinion on the shaft B2, or on the shaft D,which shaft and endless screw may be turned by a. key, as beforementioned, (sr-e iig. 4.) In this way great power may be applied to windup the spring.

Having thus described my invention, what I claim therein as new, anddesire to secure by Letters Patent, is

The herein-describedmode of winding up the spring, by the pressure ofthe operator on the sent.

ARCHIBALD C. CRARY Witnesses:

P. BATCHELER, JOHN T. WILLKs.

